Question: What do fluorescent light bulb numbers mean?

What do the numbers and letters mean on fluorescent bulbs?

Fluorescent tube shape

Linear fluorescent lamps typically include a “T” in the shape abbreviation with a number following it. This “T” stands for tube and the number that follows is the diameter of the tube. That number is divided into 8 to translate into inches. So a T8 has a one inch diameter.

What does 830 mean on fluorescent tube?

830 – The second section in the part number tells us the CRI series and Kelvin temperature of the tube. There can be manufacturer nuances in this section.

How do I know what size fluorescent bulb I need?

In order to identify which size you need, the easiest way to tell is to read the label near the base of the tube. If this information is no longer legible, you can measure the bulb’s diameter. Fluorescent tubes are measured in eighths of an inch.

How do you read a fluorescent light code?

Lamps are typically identified by a code such as FxxTy, where F is for fluorescent, the first number (xx) indicates either the power in watts or length in inches, the T indicates that the shape of the bulb is tubular, and the last number (y) is the diameter in eighths of an inch (sometimes in millimeters, rounded-up to …

IT IS AMAZING:  Do I need headlamp converters in France?

How do I know if I have T8 or T12?

The main difference between T8 and T12 tubes is the tube’s diameter. T12 tubes are 1.5″ in diameter while T8s are just one inch. All other things—socket sizes, lengths, distance between pins—are the same. T8 LED tubes won’t fall out if you try to install them in a T12 fixture—they’ll fit just fine.

What’s better T5 or T8?

If you do not need as many lumens, the lesser wattage T8 would be the better choice since it offers lower lumen and watt consumption. If you need higher levels of lighting, the T5 might be ideal for your situation.

What does T8 or T12 mean?

A T12 lamp (on the left in the figure below) is therefore twelve-eighths of an inch, or one-and-one-half inches (3.81 cm), in diameter. A T8 lamp (on the right in the figure below) is eight-eighths of an inch, or one inch (2.54 cm), in diameter.

What does 840 mean on a fluorescent tube?

The first digit is the CRI with 8 representing 80% and 6 representing 60% etc. The last 2 digits are the colour temperature in hundreds of Kelvin so 6000K would be represented by 60. So for example 840 means the lamp has a CRI of 80% and a colour temperature of 4000K.

How do I tell what size light bulb I need?

The light bulb size is determined by the maximum overall diameter (MOD) of the bulb’s shell. It is represented in eighths of an inch (1/8″). It’s also important to keep in mind the bulb’s length (or height) that is defined as the maximum overall length (MOL) expressed in inches.

IT IS AMAZING:  Can you smoke your headlights?

How do I know what light bulb to buy?

How to Buy the Right Light Bulb

  1. Check your bulb base size and bulb shape. …
  2. Determine much light you need. …
  3. Select the right color of white for your light bulb. …
  4. Find out if you need to dim your light. …
  5. Find out if your light bulb will be used in an enclosed fixture or recessed can. …
  6. Choose the right type of light bulb.